reenabled test

android/app/src/test/java/com/reactnativenavigation/EnvironmentTest.java

 
 import com.facebook.react.common.ReactConstants;
 
-import org.junit.Ignore;
 import org.junit.Test;
 import org.robolectric.Robolectric;
 import org.robolectric.RuntimeEnvironment;
 	}
 
 	@Test
-	@Ignore
 	public void ableToLoadApplication() throws Exception {
 		assertThat(RuntimeEnvironment.application).isNotNull();
 		assertThat(Robolectric.setupActivity(NavigationActivity.class)).isNotNull();